[yt-users] phase plot CellVolume and CellVolumeCode

gso at physics.ucsd.edu gso at physics.ucsd.edu
Tue Feb 23 13:54:58 PST 2010


Yes the 2nd post should say in this order
"Density","IonizationFraction","CellVolumeCode"
and yes the weight=None fixed the plot, which I thought was on by default
but when I checked again the default is actually "CellMassMsun"

From
G.S.

> Hi Geoffrey,
>
> By default, the phase plot takes the average and weighs that average
> by the mass in a cell.  Both of your plots should have "weight=None"
> in the argument list, so that the total of the third quantity
> ("CellMassMsun" and "CellVolumeCode", but I think for the second your
> script must be different than what you copy/pasted) in each bin is
> displayed, rather than the average.  For a unigrid simulation, the
> average CellVolumeCode will be constant everywhere, and the average
> Mass will increase with Density, as M = rho * V where V is a constant.
>
> -Matt
>
> On Tue, Feb 23, 2010 at 1:22 PM,  <gso at physics.ucsd.edu> wrote:
>> When I tried the following:
>> p = pc.add_phase_object(dd,
>> ["Density","IonizationFraction","CellMassMsun"], lazy_reader = True)
>>
>> this gave me a phase plot of IonizationFraction vs Density, and the z
>> axis
>> colorbar shows a distribution of different masses, but if I used the
>> following:
>>
>> p = pc.add_phase_object(dd,
>> ["Density","CellVolumeCode","IonizationFraction"], lazy_reader = True)
>>
>> I get no distribution in the z colorbar at all.  The z values seem to be
>> put into place but not accumulated when multiple y vs x have the same
>> value.  Can anyone verify this behavior?  I was looking through the
>> documentation
>>
>> http://yt.enzotools.org/doc/modules/plotting.html?highlight=phase#yt.raven.PlotCollection.add_profile_object
>>
>> but the "accumulation" parameter sets whether the y values are summed
>> along x instead of the z colorbar.
>>
>> The plots are attached.
>>
>> From
>> G.S.
>> _______________________________________________
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>>
>>
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